[DanEC]

I think an issue is when a windage tray is used which requires a gasket above and below which is effectively doubling the gasket thickness and related issues such as maintaining compression. I suspect most pan fastener tension (torque) requirements were for a non-windage tray installation. Throw in another gasket to the mix and the standard fastener tension is no longer adequate to maintain compression of both gaskets without constant attention and re-tightening - and maybe not even then. But if the bolt torque/tension is increased to compensate for 2 gaskets, we run the risk of distorting the pan flange. One way to try and deal with this would be to fabricate a flange reinforcement plate (one for each side) out of at least 1/8 inch steel plate that is drilled for the bolt pattern and fits down in the pan flange recess. Then the bolts can be tightened down more without fear of distorting the pan. Of course the bolt size is a limiting factor on how tight you can go. My 2 cents anyway.